From: Nadav Amit <namit@vmware.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: <kvm@vger.kernel.org>, Nadav Amit <namit@vmware.com>
Subject: [kvm-unit-tests PATCH 2/3] x86: realmode: hlt loop as fallback on exit
Date: Fri, 26 Jun 2020 02:23:32 -0700 [thread overview]
Message-ID: <20200626092333.2830-3-namit@vmware.com> (raw)
In-Reply-To: <20200626092333.2830-1-namit@vmware.com>
For systems without emulated devices (e.g., bare-metal), use halt-loop
when exiting the realmode test.
Signed-off-by: Nadav Amit <namit@vmware.com>
---
x86/realmode.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/x86/realmode.c b/x86/realmode.c
index ef79f7e..301b013 100644
--- a/x86/realmode.c
+++ b/x86/realmode.c
@@ -115,6 +115,10 @@ static int failed;
static void exit(int code)
{
outb(code, 0xf4);
+
+ while (1) {
+ asm volatile("hlt" ::: "memory");
+ }
}
struct regs {
--
2.20.1
next prev parent reply other threads:[~2020-06-26 9:26 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-26 9:23 [kvm-unit-tests PATCH 0/3] x86: realmode: fixes Nadav Amit
2020-06-26 9:23 ` [kvm-unit-tests PATCH 1/3] x86: realmode: initialize idtr Nadav Amit
2020-06-26 10:41 ` Paolo Bonzini
2020-06-26 9:23 ` Nadav Amit [this message]
2020-06-26 9:23 ` [kvm-unit-tests PATCH 3/3] x86: realmode: fix lss test Nadav Amit
2020-06-26 10:43 ` [kvm-unit-tests PATCH 0/3] x86: realmode: fixes Paolo Bonzini
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